care for bodily functions; toileting assistance
Specifically refers to helping someone with toileting, bedpans, urinary bottles, and related personal care, often in nursing or caregiving contexts.
In nursing homes, toileting assistance is also one of the important tasks.
Compound of 下 (しも, 'lower part; below') and 世話 (せわ, 'care; looking after'), literally 'care for the lower body'.